SILVER CAST IRON BOILERS. Pennco SILVER makes Simple Comfort, Affordable.

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1 SILVER ST IRON OILERS Pennco SILVER makes Simple omfort, ffordable.

S I LVER ST IRON OILERS f f o r d a b l e H y d r o n i c H e a t i n g Pennco S I LV E R While today s tough economy makes it harder than ever to meet basic needs simple comfort shouldn t be a

2 S I LVER ST IRON OILERS f f o r d a b l e H y d r o n i c H e a t i n g Pennco S I LV E R While today s tough economy makes it harder than ever to meet basic needs simple comfort shouldn t be a sacrifice. That s why Pennco now offers SILVER a full line of affordable heating products. merican made Pennco SILVER is designed, tested and assembled to ensure customers get the very best in home heating comfort and value. Financing is available to those who qualify through GE Money. pply on-line today at: dded peace-of-mind is available in the form of five and ten year omfort Plus Extended Parts & Labor Warranties which can be included in the financed cost. E ff i c i e n c y Pennco SILVER features economical, mostly mid-efficiency heating solutions. Pennco understands that no one really plans to replace their heating system and not everyone can afford to upgrade to high efficiency. If your home heating appliance is more than 15 years old, even a mid-efficiency upgrade could save you money on your utility bills. S e l e c t i o n Pennco SILVER features a wide range of heating equipment suitable for residential and light commercial applications. 2

15 Series FS Series KSW Series 16 Series KS Series 41J Series Hotline o i l e r S e l e c t i o n

oiler Gas Mid-Efficiency 45-70 - 96-120 - 145 - tmospheric himney 175-195 - 245-295 MH FS

5-225 MH or Side-Wall KSW Residential Hot Water oiler Oil Mid-Efficiency 84-105 - 140-126 - 175 -

150-187 - tmospheric himney 225-262 - 299 MH KS Residential Steam oiler Oil Energy Star 91-140 -

Mid-Efficiency 300-3,000 MH tmospheric himney or Steam oiler Hotline Residential/Light ommercial

3 15 Series FS Series KSW Series 16 Series KS Series 41J Series Hotline o i l e r S e l e c t i o n G u i d e Model pplication Fuel Efficiency apacity ombustion Venting 15 Residential Hot Water oiler Gas Mid-Efficiency tmospheric himney MH FS Residential Hot Water oiler Gas Mid-Efficiency Fan ssist himney MH or Side-Wall KSW Residential Hot Water oiler Oil Mid-Efficiency tmospheric himney MH 16 Residential Steam oiler Gas Mid-Efficiency tmospheric himney MH KS Residential Steam oiler Oil Energy Star tmospheric himney MH 41J Light ommercial Hot Water Gas Mid-Efficiency 300-3,000 MH tmospheric himney or Steam oiler Hotline Residential/Light ommercial N/ * Gal. N/ N/ Indirect Hot Water Heater Efficiency varies based on boiler efficiency and other factors. * 3

R e s i d e n t i a l H o t W a t e r o i l e r s 15 S e r i e s Gas-Fired Hot Water oiler System Features The Pennco 15 Series oiler has been designed with features making it the ideal home heating

4 R e s i d e n t i a l H o t W a t e r o i l e r s 15 S e r i e s Gas-Fired Hot Water oiler System Features The Pennco 15 Series oiler has been designed with features making it the ideal home heating solution. With quality features such as an advanced heat exchanger design, greater TU input per sectional size and optional electronic ignition, the 15 Series can achieve fuel efficiencies up to 82% FUE. Quality Heat Exchanger Design The 15 Series f e a t u res a robust cast iron heat exchanger with greater weight per section resulting in higher efficiencies and longer boiler life. The sections are connected with cast iron push nipples, which expand and contract at the same rate as the sections ensuring a water tight seal. dditional sizes are available and when utilized in a seven section configuration, the 15 Series can reach nearly 300 MH input. High Efficiency The 15 Series provides annual fuel utilization efficiency up to 82% as certified by the US Department of Energy testing standards. Hi-Limit ontrol The Honeywell hi-limit control has been separated from the circulator relay for ease of serviceability and to reduce potential service parts costs. Easy Installation and Maintenance compact design, low profile draft hood and top supply piping connections allow for easier installation. The pilot is mounted to the front of the burner base. 1 1/4" Supply 3 9/16" "" "" "" "F" "D" 25 5/16" "E" 4" oiler Jacket a s t - I ron oiler attery High Limit ontro l Vent Damper Relay ombination Pre s s u re Te m p e r a t u re Gauge irculator Stainless Steel urners utomatic Vent Damper ombination 24-Volt Gas ontrol includes: utomatic Gas, Gas Pressure Regulator, utomatic Pilot, Safety Shut Off, Pilot Flow djustment, Pilot Filter.S.M.E. Relief Drain Optional Equipment: Intermittent Electric Ignition Pilot System ombustible Floor Kit Taco irculator Pump. Note: Propane option available. 3 1/2" 1 1/4" Return 1 1/4" 5 7/8" ME# 39-86E Vol VIII Pump Size. G.. H e a t i n g I = = R N a t u r al Dimensions (Inches) N u m b e r F U E F U E o i l e r S u p p l y I n p u t a p a c i t y Net Output G a s o f Elec. Ign. Std. Pilot N u m b e r & Return tu/h r. * tu/h r. * tu/h r. * I n l e t u rn e r s & Damper & Damper D E F Ta p p i n g s , , , / 2 " " % % , , , / 2 " " % % , , , / 2 " " % % , , , / 2 " " % % , , , / 2 " " % % , , , / 2 " " % % , , , / 2 " " % % , , , / 4 " " % % , , , / 4 " " % % 4 * For elevations above 2000 feet, ratings should be reduced at a rate of 4% for each 1000 feet above sea level. For equivalent square feet of radiation, divide I==R output by 150. Propane gas Inlet, all units, 1/2".S.. ertified For Natural Gas Or Propane Tested For 100 LS. SME Working Pressure

R e s i d e n t i a l H o t W a t e r o i l e r s FS S e r i e s Gas-Fired Hot Water oiler Side-Wall or himney Vent SME Relief Supply ombination Limit & Relay ontrol 23 1/4" lower 3" ssembled boiler

5 R e s i d e n t i a l H o t W a t e r o i l e r s FS S e r i e s Gas-Fired Hot Water oiler Side-Wall or himney Vent SME Relief Supply ombination Limit & Relay ontrol 23 1/4" lower 3" ssembled boiler with insulated jacket 3" x 4" galvanized increaser fitting and silicone sealant to adapt 3" fan outlet to 4" vent pipe for chimney venting ombination high limit control and circulator relay 24 volt transformer to power gas control system Flame rollout safety shut-off fuse link (rollout switch) Pressure switch for proving air flow ombination pressure/temperature gauge (packed separately) 1 1 /4" circulator 3 /4" boiler drain valve 30 lb. SME relief valve ompletely installed and wired gas control system with burners and manifold, consisting of: Stainless steel burners utomatic redundant combination gas valve, 24 volt, with pilot filter Pressure regulator Intermittent Pilot ontrol, continuous re-try, 100% shut-off for natural & propane gas ombination pilot/burner/electrode/flame sensor omplete installation instructions Optional Equipment: ombustible floor plate 24"x 30" for 2-5 section; 3 0"x 30" for 6 & 7 section T j e rnl und VH-1-3" side wall vent hood T j e rnl und VH-1-4" side wall vent hood P ropane gas to natural gas conversion kits Natural gas to propane gas conversion kits 1-1/4"NPT Drain Manifold LEFT SIDE FRONT RIGHT SIDE ME# E Vol. III D O E n n u a l o i l e r N u m b e r G H e a t i n g I = = R F u e l M o d e l o f I n p u t a p a c i t y Net Rating Wi d t h E ff i c i e n c y N u m b e r S e c t i o n s ( M H ) ( M H ) ( M H ) ( F U E ) FS " 84.4 FS " 83.4 FS " 83.0 FS " 82.7 FS " 82.3 FS " 82.0 MH = 1,000 tuh tuh = ritish Thermal Unit Per Hour FUE and Heating apacity are based upon D.O.E (Department of Energy) test procedure. * onventional venting through a lined chimney use 4" Flue dapter provided. * Through the wall venting Sizes use 3" Stainless Steel Vent Pipe. Sizes 6-7 use 4" Stainless Steel Vent Pipe (not included).s.. ertified For Natural Gas Or Propane Rollout Switch 29" Return Pressure Switch Intermittent INTERMITTENT Pilot ontrol PILOT ONTROL Gas Tested for 50 lbs. SME Working Pressure KSW S e r i e s Oil-Fired Hot Water oiler ssembled boiler with insulated jacket ombination high limit control and circulator relay, on boilers without optional tankless heater coil ombination high limit control, low limit control and circulator relay, on boilers with optional tankless heater coil Target wall (vacuum formed refractory ceramic fiber) ombination pressure/ temperature gauge arometric draft control 6" 1 1 /4" circulator 3 /4" boiler drain valve 30 lb. SME relief valve eckett FG series oil burner equipped with nozzle, primary control, interrupted duty ignition, PS motor and clean cut (solenoid) pump Model No. Model No. N u m b e r **H e a t i n g w i t h w i t h o u t o f I n p u t a p a c i t y Tankless oil Tankless oil S e c t i o n s *M H* *M H* 36" Gauge 1 1/4" Return 1 1/4" Supply ontrol quastat ontrol (with oil) Tankless Heater 1/2" N.P.T. 19 5/8" 9" FRONT VIEW SIDE VIEW K VIEW N E T F i r i n g I = = R R a t e Rating *M H* * G P H 3/4" SME Relief Ta n k l e s s D I M E N S I O N S H e a t e r h i m n e y ( I n c h e s ).F.U.E. a p a c i t y S i z e G P M * 3K.60 3K x8x / / K.75 3K x8x / / K1.00 3K x8x / / K.90 4K x8x / K1.25 4K x8x / K1.50 4K x8x / p p ro x. S h i p p i n g We i g h t 5K1.20 5K x8x / K1.75 5K x8x / K2.00 5K x8x / * MH = 1,000 tu per hour tu = ritish Thermal Unit * * Heating capacity based on 13% O2 with a ÑO.02î W.. draft o v e rf i re, and a #1 smoke or less. Testing was done in accordance with the D.O.E. (Department of Energy) test pro c e d u re. GPH = Gallons per hour oil at 140,000 tu per gallon Gallons of water per minute, heated from 40 to 140, with 200 boiler water temperature, intermittent draw..f.u.e. = nnual Fuel Utilization Efficiency based on D.O.E. test procedure. s an Energy Star Partner, Pennco has determined that this product meets Energy Star guidelines for energy efficiency. Tested for 50 lbs. SME Working Pressure 5

6 R e s i d e n t i a l S t e a m o i l e r s 16 S e r i e s Gas-Fired Steam oiler ssembled boiler with insulated jacket Two 2 1 /2" supply tappings and two 2 1 /2" return tappings Integral draft diverter built into jacket 24 volt, 40V transformer Pressure limit control E l e c t ronic probe type low water cut off Flame rollout safety shut-off fuse link and blocked vent safety shut-off switch Glass water level gauge Steam pressure gauge 3 /4" boiler drain valve 15 lb. SME pop safety valve Two 2 1 /2" s q u a re head pipe plugs t o plug unused supply and re t u rn tappings Vent damper ompletely installed and wired gas control systems with burners and manifold, consisting of: utomatic redundant combination gas valve, 24 volt, with pilot filter Electronic Ignition Only: Intermittent Pilot ontrol, continuous re-try,100% shut-off ombination pilot/burner/ electrode/flame sensor Standing Pilot Only: Pilot burner and thermocouple Optional Equipment: ombustible floor plate for 3-6 section; for 7-9 section Electronic water feeder Float type low water cut-off in place of probe type Natural to propane conversion kit (when ordering kit, please provide serial number of boiler to be converted) SME Pop Safety 29" 12 1/4" 2-1/2" NPT Vent Damper Pressure Gauge Water Line Low Wa t e r u t - O ff 36 3/8" Transformer 26 1/2" 4 3/4" 2-1/2" Glass P ro b e Low Gauge S86 Water 24" ut-off Gas Line OILER UNIT NUMER N TURL GS P R O PNE GS D I M E N S I O N S ( i n. ). F. U. E. ME# E ont. Pilot E/I Pilot N u m b e r G H e a t i n g N E T N E T G H e a t i n g N E T N E T H S D H S I D w i t h w i t h o f I n p u t a p a c i t y I = = R I = = R I n p u t a p a c i t y I = = R I = = R F l u e w i t h w i t h D a m p e r D a m p e r S e c t i o n s M H M H M H * Sq. Ft. EDR M H M H M H * Sq. Ft. EDR D i a m e t e r Wi d t h D a m p e r D a m p e r 1603HSD 1603HSID / HSD 1604HSID / HSD 1605HSID / HSD 1606HSID HSD 1607HSID / HSD 1608HSID / HSD 1609HSID / For altitudes above 2,000 feet, ratings should be re d u c e d at a rate or 4% for each 1,000 feet above sea level. MH = 1,000 tu per hour tuh = ritish Thermal Unit per hour Heating capacity based on D.O.E. (Department of Energy) standard s * dd 5-1/2 " to height for vent damper EDR = Equivalent Direct Radiation Gas Tested for 50 lbs. SME Working Pressure K S S e r i e s Oil-Fired Steam oiler rated ast-iron oiler Flush Jacket Swing-Out urner Door lean ut eckett urner Target Wall /Liner SME Relief Water Level Gauge Steam Pressure Gauge Steam Pressure ontrol E l e c t ronic Low Water ut-off Drain Wiring Harness urner Electric Disconnect Plastic over Supply Tappings (Qty. 2-2") Return Tapping 1 1 /2" Skim Port Tankless Water Heater Option: Tankless Hot Water oil Limit ontrol 6 ME# E I = = R I = = R D I M E N S I O N S Tankless Wa t e r Oil urn e r D. O. E. Net Ratings 3, 4 Heater apacities o i l e r o i l e r I n p ut 2 H e a t i n g Pump N o z z l e I n t e rm i t t e n t Wa t e r M o d e l a p a c i t y S t e a m Sq. Ft. P re s s u re F u rn i s h e d. F. U. E. Length of F ront of Jkt. t o Diameter of Draw G.P. M. o n t e n t N u m b er 1 G. P. H. M H 4 M H 4 M H S t e a m P S I 140 PSIG 5 R a t i n g Flush Jacket /L of Flue Out Flue Outlet (Model L-24) G a l s. *KS0365* ** 1 1 KS *KS4100* KS KS KS H KS H KS KS * Indicates an Energy Star efficient Product Explanation Notes: Electronic Low Water ut-off Oil urner 1. dd suffix T to denote boiler with tankless heater. 2. I==R burner capacity is based on an oil heating value of 140,000 tu/gal. and with 13% O2. 3. Net ratings based on 170 F temperature in radiators and include 33% allowance for normal piping and pick-up load. onsult manufacturer for unusual piping and pick-up re q u i rements. 21 7/8" 9 1/32" Pressure ontrol 35 3/4" 16" SME Pressure Relief 4. For altitudes above 2,000 ft., ratings may be reduced at the rate of 4% for every 1,000 ft. above sea level. 5. Nozzle sizes with an H designation are Hago brand, all others are Delevan. 6. The electrical service is120 Vo l t s, 15 mps,60 Hz. vailable on request. ** Tested For 15 LS. SME Working Pressure

o m m e r c i a l H o t W a t e r & S t e a m o i l e r s 4 1 J S e r i e s Gas-Fired Hot Water or Steam Modular oiler Electronic Ignition ase ase Fire Door urner Orifice Manifold Main and Pilot

Drain omplete Jacket ssembly Steam Trim Package: Low Water ut-off Glass Gauge Set Pop Safety Steam Gauge Pressure Limit Drain omplete Jacket ssembly 41J Series oiler ases are pre a s s e m b l e d at

7 o m m e r c i a l H o t W a t e r & S t e a m o i l e r s 4 1 J S e r i e s Gas-Fired Hot Water or Steam Modular oiler Electronic Ignition ase ase Fire Door urner Orifice Manifold Main and Pilot urner Electronic Pilot Gas Intermittent Pilot Module High Gas Pre s s u re Switch Water Trim Package: Limit ontrol (two required on units 2,500,000 TU and larger) Pressure Temperature Gauge Relief Drain omplete Jacket ssembly Steam Trim Package: Low Water ut-off Glass Gauge Set Pop Safety Steam Gauge Pressure Limit Drain omplete Jacket ssembly 41J Series oiler ases are pre a s s e m b l e d at the factory with burner manifold, burn e r orifices, gas valves, electronic ignition and pilot installed, ready for field installation of the pre-tested sections and appro p r i a t e p a c k a g e s. Plug 'N Play Harness and Junction ox Individual base and junction box controls are designed for easy installation with Plug 'n Play h a rnesses. The entire boiler links together in a "snap". color-coded factory supplied harn e s s eliminates wiring erro r s. Modular Efficiency Most commercial boilers are either all-on or all-off. The 41J boiler when used in conjunction with the optional rgo M ontrol Kit will stage fire the individual bases. Depending on model, capacities as low as 11% of full load can be obtained for optimal perf o rm a n c e. The optional M ontrol Kit adjusts the water temperature for increased fuel economy. The control balances section run time for i n c reased re l i a b i l i t y. The modular base design allows for built in back-up to reduce no heat situations. SD1 Option 41J boilers are available with a SD1 option to comply with SD1 standards where required by public building code. The SD1 option provides the increased number of controls and safety devices required to meet SD1 standards. 80% Thermal Efficiency * If opening F is to be used for something other than the Pop Safety or Pressure Relief, or the Safety/Relief is larger than 1 ", t h e Safety/Relief must be installed in the Header Piping as near to the boiler as possible. 41J Series Right-End and Left-End Tappings Data. G... G.. ase Size & h i m n e y Net I==R Ratings F l u e o i l e r Input (1) Output (1) Flue Outlet Size (6) o l l e c t o r M o d e l S t e a m S t e a m Wa t e r Size To tu Mbh tu Mbh I.D. x Ht. Sq. Ft. (3) tu Mbh tu Mbh 8 in. 10 in. 12 in. h i m n e y " x 20' " x 20' " x 20' " x 20' " x 20' " x 20' " x 20' " x 20' " x 20' " x 20' " x 20' " x 20' " x 20' " x 20' " x 20' " x 20' " x 20' " x 20' " x 20' " x 20' " x 20' " x 20' " x 20' " x 20' " x 20' " x 20' " x 20' " x 20' Explanation Notes: 1. Ratings are at sea level to 2,000 feet. For altitudes above 2,000 feet, reduce all ratings 4% for each 1,000 feet above sea level. 2. Ratings in square feet are computed at 240 tuh/square foot for steam boilers. 3. Ratings based on 33,500 tuh per horsepower. 4. Pressure drop based on given flow from a single outlet and returning to a single inlet at the opposite end of the boiler. D 5. himney sizes shown are one option based on a typical venting system, and sized according to the National Fuel Gas ode, assuming Type double wall vent and vent connectors, other venting system designs are acceptable as shown on Flue onnection nd Venting section of the installation manual. For further chimney design and sizing information, consult the National Fuel Gas ode, NSI Z223.1/NFP 54-latest revision, or SHRE-1996 HV Systems and Equipment Handbook, hapter 30, himney, Gas Vent, and Fireplace Systems, or the Standard for himneys, Fireplaces, Vents, and Solid Fuel urning ppliances. NFP 211 latest revision. Follow standard engineering practice. F G E O P E N I N G S I Z E S T E M WT E R 4 " Supply and Return Supply and Return 1 /2" P r i m a ry LWO and Gauge Glass Set P re s s u re Dro p H o r s e p o w e r T h ru Water oiler (5) G ro s s Output (4) I n. G P M Wa t e r P l u g g e d 1 1 /2" Drain, Right End Drain, Left End 3 /4" Drain, Right End Drain, Right End D 1 /2" P l u g g e d Limit ontro l E 1 " c c e s s o r i e s c c e s s o r i e s * F * 1 " Pop Safety Va l v e P re s s u re Relief Va l v e G 3 /4" Plugged or Electro n i c ( P robe Type) LW O P l u g g e d Tested for 100 lbs. SME Working Pressure 7

8 R e s i d e n t i a l H o t W a t e r H e a t e r s P e n n c o Indirect Hot Water Heater o m m e rcial Quality and apability. Residential ff o rd a b i l i t y Domestic Water Hot and old Side onnection HL 30SK, HL 40SK, HL 50SK. Hot Only Top onnection HL 80SK,H L1 1 9 S K. old Only ottom/side HL 80SK, HL1 1 9 S K. oil onnections Include dielectric unions for both inlet and outlet 2 Foam Insulation Heavy-Duty Steel Jacket Replaceable Extra-Thick Magnesium node Rod o rrosion Resistant Porc e l a i n - c o a t e d Enamel Smooth oil and Interior Tank Wa l l s Immersion quastats standard on all models S u rface-mounted Therm o s t a t Self-cleaning Drain Va l v e F a c t o ry Installed T&P Va l v e NOTES: Potable outlet water temperature at 135 F as per D.O.E. oiler output should be at least 74,000 TU/h. First Hour Rating oil Output (tu/hr) Hot Outlet/ node Rod 3/4" NPT quastat Drain node Rod old Inlet 3/4" NPT T&P Relief From oiler S u p p l y, 1" NPT Models HL30SK, HL40SK, HL50SK Models HL80SK, HL119SK M o d e l S t o r a g e D I M E N S I O N S ( i n c h e s ) S h i p p i n g N u m b e r a p a c i t y D E F G H We i g h t HL30SK 30 Gal. 22" " " " " 6 1 2" 4 1 2" N/ 180 lbs. HL40SK 38 Gal. 22" " " " " 6 1 2" 4 1 2" N/ 226 lbs. HL50SK 45 Gal. 22" " " " " 6 1 2" 4 1 2" N/ 231 lbs. HL80SK 75 Gal. 24" " " 33" " 8" 5" 5" 297 lbs. HL119 S K 110 Gal. 28" " " " " 8 3 4" 5" 6 1 2" 397 lbs. MODEL F / 6 GPM* F / 10 GPM* F / 12 GPM* F / 6 GPM* F / 8 GPM* F / 10 GPM* F / 12 GPM* To oiler R e t u rn, 1" NPT F D quastat E node Rod H old Inlet 1" NPT Hot Outlet 1 1/2" NPT node Rod T&P Relief Va l v e From oiler S u p p l y, 1" NPT D rain Va l v e To oiler R e t u rn 1" NPT G F D H L 3 0 S K 53,000 57,000 59,000 67,000 69,000 71,000 73,000 H L 4 0 S K 69,000 84,000 92,000 88,000 96, , ,000 H L 5 0 S K 69,000 84,000 92,000 88,000 96, , ,000 H L 8 0 S K 76,000 91,000 98,000 97, , , ,000 H L S K 76,000 91,000 98,000 97, , , ,000 NOTES: First Hour Rating = First Draw + ontinuous Draw * oil Input (temperature, flow rate). Ratings based on 77 F rise with 58 F inlet potable water. ll data obtained through testing in accordance with GM INDIRET-FIRED WTER HETER TESTING STNDRD IWH-TS-1_MRH 2003 dditional oiler Model Notes: Selection of water boiler size should be based upon Net I==R Rating being equal to or greater than the calculated heat loss of the building. Selection of steam boiler size should be based upon Net I==R Steam Rating being equal to or greater than the installed radiation in square feet EDR. 1 5 F S K S W K S J ll boilers are design-certified for installation on non-combustible floors. For installation on any combustible floor, use combustible floor kit. If combustible floor kit is unavailable refer to installation manual for specific instructions for that model. 15 F S K S W K S J The ratings marked Net I==R Ratings represent the portion of the heat output that can be applied to heat the radiation or terminal units. Ratings based on selection factors recommended by Hydronics institute for piping and pickup. Net water boiler ratings are based on an allowance of 1.15, and net steam boiler ratings are based on an allowance of For water applications with high piping and pickup requirements, use steam rating. Ratings based on selection factors recommended by Hydronics institute for piping and pickup. Net steam boiler ratings are based on an allowance of Recommended chimney height 20 feet. In special cases where conditions permit, chimney height may be reduced. Refer to the latest revision of National Fuel Gas ode. Electrical service to be 120 volts, 15 amps, 60Hz3. Manufacturer should be consulted on installations having other than normal piping and pickup requirements. Specifications and dimensions for all Pennco SILVER models are subject to change without notice. n ISO ertified ompany Dwyer venue, Utica, New York Phone: Fax: info@ecrintern a t i o n a l. c o m Web: www. p e n n c o b o i l e r s. c o m US ontractor ssistance: PN REV 4/09

GMVC8. ComfortNet -Compatible. Heating Input: 70, ,000 BTU/h. Two-Stage, Variable-Speed Gas Furnace

GMVC8. ComfortNet -Compatible. Heating Input: 70, ,000 BTU/h. Two-Stage, Variable-Speed Gas Furnace 80% AFUE Heating Input: 70,000 115,000 BTU/h ComfortNet -Compatible Two-Stage, Variable-Speed Gas Furnace Standard Features Aluminized steel, dual-diameter tubular heat exchanger Two-stage gas valve operates