- Make up air condensing on cold air return
- Response to 'Article'
- Serial number decoding help needed
- Fireplace insert
- Vent clearance
- "PVC" Duct In A Residential Forced Air System?
- Furnace Installed in Garage
- Order of Vented Appliances
- Furnace vent type
- High Efficiency Furnace
- Heil Furnace Vintage Help
- Looked everywhere can't find humidifier type
- Unducted toe-kick register
- Timer switch on furnace...
- Havent seen this yet...
- Oil Boiler Barometric Damper
- Newer in floor tubing
- Just plain stupid
- Furnance in Garage
- Open low volt wires on top of condensing unit?
- asbestos around register
- Heat exchanger at draft hood
- TGIF
- Cat IV in bedroom closet
- Oil Furnace age
- plant that thing
- AC into Mechanical Room
- Unusual AC installation
- Oil Boiler to tan clearance
- Gas line installation requirements inside furnace firebox
- Never Ceases To Amaze!
- Adjacent Oil and Gas flues
- Oil tank vent clearances
- Heat Pump
- Help dating an ADP air handler
- Corrosion at coil
- Humidification required in Chicago?
- Readily Accessable Disconnect?
- Make-up combustion air rqmt.
- Tarnished vent at oil furnace
- Holy BLEEP!!!
- Amana Furnace Age
- When did the mechanical code first state this?
- Barometric Damper
- Cat IV Condensate
- HIGH EFFICIENTCY FURNACE VENT PIPES SCREENS
- Furnace / water heater venting
- Rubber radiant tubing identification help
- Ceil Heat
- IMPROPER EXHAUST VENTS AND DRAIN PIPE
- filters in returns
- Fernco in furnace vent pipe
- 3" Pad Rule
- A/C seemed to not be working.
- Direct Vent Furnace Venting Downhill
- What kind of vent pipe?
- Max Vertical lift of Condensate pumps?
- Storm collar
- Chimney material. Is this an asbestos product?
- Geothermal System
- Unitary / York Air Conditioning products
- Help deterimine age of Armstrong packaged heat pump? Ser# A0626DMA
- Mitsubishi Air Conditioners
- Return Register on Ceiling
- No Return Air Plenum?
- Ancient Electric Furnace
- Help Identify duct deterioation
- A/C Manufacturer?
- LP Tank - underground installation
- utica Boiler age
- Radiant Heat systems
- Real quick single wall clearance Q
- Return air in bathroom
- Unknown AC manufacturer
- Pantina-like corrosion on condenser coil
- Heat exchanger, gas hot water boiler
- dryer duct construction
- Wooden plenum for unconditioned air?
- Filter on HVAC System
- Single Unit Dual Zone System
- Sealant on vent pipes
- What Is It
- Yikes!
- Electric wall mount space heaters
- Furnace venting, I'm on a roll
- Gas company red tags furnace
- What causes flame rollout or scorching?
- Whistling vent
- Horizontal Duct to Plenum Connection Question
- Venting issue
- Water based heat pump
- Dryer vent
- What are all these weird things in my Air Duct?
- Convection heating?
- Mixed vent materials
- boiler installed in garage space - sort of
- Singer Furnace Age
- Condensate
- Max bends of a furnace flue
- Is this a heat pump?
- water heat/space heat combo
- AC
- This can't be right
- age of Weil Mclain boiler
- Need Help finding Make of Furnace-A/C unit
- Exhaust location
- Any ideas what this could be?
- Hallmark Furnace age
- Combustion air in small room with open ceiling
- HVAC ceiling mounted units
- Rectangular flue pipe
- 240V hydronic heating pump?
- Serviceman switch
- Ex. heat pump unit, now with standard gas furnace
- Age of a Carrier Condenser
- Comments please
- Do you see a problem?
- Need Help for FHP Water Source HP age?
- Round Pipe combustion air equivalency
- Venting
- Plywood duct work
- Unit in attic
- NM liquid tight, flexible conduit
- FED PAC STABLOCK AC DISCONNECT
- WHAT IS THIS??
- Correct sizing of unit for furnace
- Field Controls Power Venter runs constantly
- Buderus Boiler and Indirect fired water heater
- Laundry room exhaust venting
- Vent in bath Enclosure?
- Dryer duct venting
- Test Condensation pump
- heat controller
- This House Was Smokin'
- Inspectors' duties
- condensate trap not necessary
- Upside down condensate trap?
- Condenser Fan Motor Wiring
- Listed gas appliance exhaust termiantion
- Age of HVAC
- 3' gas vent termination height
- early hydro or swamp cooler
- Any idea why this box is here?
- Return air and fireplace
- Condensation line
- Propane Gas pipe tape
- AC differential temps
- 2 compressors, 1 FAU?
- Compression Copper Gas fittings / pipes
- 'Season' Compressor
- Weil Mcclain boilers
- plastic Mylar bath ducting in attics
- A/C coils
- Commercial Ventilation
- Dryer vent/AC condenser clearance
- Decoding older Rheem furnace Serial # - looking for manuf date
- 3 AC Condensors on One Breaker.
- Mammoth Heat/ Boiler
- undergroud oil storage tank vent?
- Tankless Water heater distance from propane tank
- AC coil fins
- HVAV proximity to furnace venting
- Radiant floor heat
- Need a name for this component.
- Venting gas furnace in attic
- core obstruction
- Vent connector length at WH draft hood
- Should NM wiring be recommended?
- Should NM wiring be recommended?
- Size matching of evaporator and condenser
- Electric furnace temperature rise?
- Height of furnace vent above grade
- Height of furnace vent above grade
- sealed crawl space and gas appliances
- AC refrigerant lines in plenum
- In Floor and DHW
- Flex vent at furnace
- thermostat
- Age of Goodman AC Condenser Unit
- Shared HWT & Furnace Flue (High Efficiency)
- Age of Carrier brand evaporator
- air handler internal condensate device?
- Furnace venting
- Can anyone supply the brand name of this old furnace
- Need help decoding lennox htr age
- Comments on shared furnace / water heater vent
- Furnace in the garage
- Clearance for underground propane tank
- Age, history of this old boiler?
- Frost or ice on the outside of a heat pump compressor
- water in furnace pan
- Heat shield
- pvc venting
- Duct Material in 1960's Home
- Heat exchanger
- ceiling/floor/wall hydronic systems
- 100 amp Circuit breaker to 30 amp packaged unit
- Carrier Comfort Zone II
- Age on a Gaffers & Sattler Furnace
- Concentric vent termination
- PVC or CPVC vent pipe on tankless heater?
- Experience with oil fired furnances & boilers?
- Screen in jets of furnace
- Unfamiliar flue
- Heat pump timer?
- Bent Fins
- Return vs. fireplace
- Who needs combustion air?
- Older Rheem rooftop Package
- HI and also the Buyer
- Gas tubing fires linked to lightning raise concern
- Covering AC Condensers in the Winter
- deposits on water heater and furnace
- No attic drip pan
- Dimmer controls air handler fan??
- furnace technical help needed
- Geothermal System
- Crawl space plenum
- Boiler in Hallway of Small House
- Fuel oil leak
- Carrier Air Handler
- Want to be sure on age
- Installed For the Long Haul
- Air Conditioner A/C exterior drain line
- Vented gas fireplace
- Propane stove vented under deck
- Abandoned Propane Tank
- Furnace install question
- Water Heaters used for DHW and space heating
- Boiler Pump Dielectric
- Is It Hot Enough For You???
- That was an easy fix!
- Combustion air vent (from garage)
- Age of This Air Handler
- Chimney shroud
- Can someone date this Furnace
- Combustion Air
- Frequency of cleaning ducts
- Clean Easy Drain
- Heat pump operation
- Fluepipe routed through ductwork
- Is this a gas pipe or water pipe?
- Two gas furnaces venting in same chimney
- Adjustable B' vent?
- No data plate on furnace or AC???
- Pennco boiler age
- How Many Ways Can You Disrespect a B Vent?
- odd exterior vent??
- Corroded Radiator piping in Concrete
- Fire Dampers